Accurate representation of existing facilities with ornate or elaborate fixtures is limited by the amount of labour required in conventional surveying data collection techniques. Three dimensional laser scanning may replace the use of conventional surveying practices by faster and more complete data collection in some instances. The completeness of the data coupled with the reduced time in the ...

Digital terrain models form the basis for distributed hydrologic models as well as for two-dimensional hydraulic river flood models. The technique used for generating high accuracy digital terrain models has shifted from stereoscopic aerial-photography to airborne laser scanning during the last years. Since the disastrous floods 2002 in Austria, large airborne laser-scanning flight campaigns ha...

There are many needs for the ability to fast acquire 3D data from environmental surroundings, such as navigation, mapping, localisation and robot mobility, fire and police planning, urban planning, but the technology for acquiring dense, wide ranging, accurate 3D data is too expensive to be used widely. A low-cost, 360 continuous scanning, portable 3D laser scanner is presented. The accuracy of...

A long tunnel is a typical linear man-made infrastructure. The shape, especially the cross-sectional shape, and geometric parameters of the tunnel are very important for the safety of transportation. A multi-sensor integration approach is presented to survey the shape of the tunnel dynamically. With efficient collection of high-precision spatial points of structure surface, a laser scanner is w...

Using three-dimensional laser scanner system to measure the Turtle Mountain Han tomb and obtained the point cloud. To the noise points and large holes on the surface, this paper first present an approach that based on the basic principle of least-squares to eliminate the noise points. Then on the basis that there is certain continuity between the holes and their surrounding surface, an approach...

Cameras and laser scanners are two important kinds of perceptive sensors and both become more and more commonly used for intelligent ground vehicles; the calibration of these sensors is a fundamental task. A new method is proposed to perform COMPREHENSIVE extrinsic calibration of a SINGLE camera-2D laser scanner pair, i.e. the process of revealing ALL the spatial relationships among the camera ...

This work presents an alternative for using a laser scanner to perform tasks like the relative positioning of two mobile robots, allowing obtaining a final formation. It is presented a strategy for the localization of the leader robot of the formation through the information got by the laser scanner, which is mounted in the follower robot. The paper includes an analysis of the stability of the ...

Airborne laser scanning is an applicable method to derive digital terrain models (DTMs) in wooded terrain. A considerable amount of the laser points are re°ections on the tree tops (vegetation points). Thus, special ¯ltering algorithms are required to obtain the ground surface. Earlier, we proposed to use iterative linear prediction. We review existing methods and compare them to our approach. ...